As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICER`S SIDE EFIS & SGU FAIL FOLLOWED BY INTERMITTENT AHRS FAILURE. AHRS FAIL INCLUDED RADIO ATT GOING TO ZERO WITH GEAR NOT DOWN WARNING. BURNING SMELL BRIEFLY ACCOMPANIED ABNORMALITY. SMELL WAS BRIEF, 30 SEC & APPROX HALFWAY THROUGH ABNORMALITY. REMOVED & INSTALLED NR 2 SYMBOL GENERATOR, RE-RACKED AHRS IAW ATR 42 AMM JIC 34-71-82 EAI 10000. INSPECTED COCKPIT AREA & CANNOT DUPLICATE THE BURNING SMELL IAW AMM JIC 34-71-82.